Device for twisting wire in concrete-form work



Nov. 26, 1929. R. A.A. DREWS DEVICE FOR TWISTING WIRE IN CONCRETE FORM WORK Filed Aug. 20. 1928 anozwugo Patented Nov. 25, 12 229 UNTED STTES RUDOLPH A. A. DREWS, OF IOWA CITY, IOWA I DEVICE FOR 'IWISTING WIRE IN CONCRETE-FORM WORK Application filed August 20, 1928.

This invention aims to provide a simple but effective means for twisting wires together, and, especially, for twisting together wires which are used in connection with con- 5 crete forms. The invention has for its objects, the provision of novel means for rotating the twisting member, for holding the wire in the twisting member, and for operatively connecting the retainer with the back stop pawl, so that the back stop pawl may be actuated by the retainer.

It is within the province of the disclosure to improve generally and to enhance the utility of devices of that type to which the invention appertains.

with the above and other objects in View, which will appear as the description proceeds, the invent-ion resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, may be made within the scope of what is claimed, without departing from the spirit of the invention.

In the accompanying drawings Figure 1 shows in side elevation, a tool constructed in accordance with the invention, parts being broken away;

Figure 2 is a section on the line 22 of Figure l.

The tool forming the subject matter of this application may conveniently be made out of pressed steel, the tool including a handle 1,"

' the constituent members of which are held together by rivets 2. The handle 1 includes spaced side members or plates 8 having bearing openings 4. In one end of the tool there is an opening or notch 5 which communicates with the bearing openings 4. In the openings 4 are journaled the reduced ends 6 of a ratchet wheel 7 having teeth 8 that are located between the side plates 3. In the edge of the ratchet wheel 7 there is a recess 9. The ratchet wheel has a wire holding means. preferably in the form of a tongue 10 that projects into the recess 9 from the central part of the ratchet wheel.

A pivot member 11, such as a rivet, is mounted in the handle of the tool, and on the Serial No. 300,830.

pivot member, 11, an actuating pawl 12 is mounted to swing, the actuating pawl being adapted to cooperate with the teeth 8 of the ratchet wheel 7. Hook shaped retainers 14 are located on the outside of the parts 3 of the tool and are connected at their inner ends by a transverse keeper 15 adapted to be engaged by a spring latch 16 mounted on the handle 1.

WVithin the handle of the wrench is located a back stop pawl 17 cooperating with the teeth 8 of the ratchet wheel 7. The back stop pawl 17 is mounted on a pivot element 18 which is spaced from the pivot member 11, the pivot member 11 constituting a mounting not only for the actuating pawl 12, but, as well. for the retainers 14. The back stop pawl 17 carries a spring tongue 19 which engages with the handle 1, within the handle. To maintain the back stop pawl yieldingly in cooperating relation to the teeth 8 of the ratchet wheel 7, a spring tongue 20 is secured to the actuating pawl 12 and constitutes means for maintaining the actuating pawl yieldingly engaged with the teeth 8 of the ratchet wheel. The spring tongue 20 has a bearing on the butt end of the back stop pawl 17 audit is, therefore, unnecessary to provide any specific place of abutment for the end of the spring tongue 20, the back stopv pawl 17, thus, being made to exercise an add ed function.

The back stop pawl 17 has lateral projections 21 which extend outwardly through enlarged openings 22 in the side members 8 of the tool. The projections 21 on the back stop I pawl 17 are so located that they can be engaged by the inner edges of the retainers 14. There are spaced holes 23 in the handle 1 of the tool. p

In practical operation, the twisting may be started by putting the wires through the holes 23 in the handle, and giving the handle a turn or two. The twisting operation is completed by the rotation of the ratchet wheel 7 The keeper 15 is disengaged from the spring latch 16, and the retainers 14 aretilted on the pivot element 11 into the dash line position of Figure 1. This opens the notch 5 and the recess 9, so that the wires can be 1 slipped into the recess 9, astride of the tongue or wire holding means 10. When the retainers move to the dash line position of Figure 1, the projections 21 on the back stop pawl 17 follow the retainers, and the back stop pawl is permitted to move into engagement with the teeth 8 of the ratchet wheel 7, so as to hold the ratchetwheel against rotation whilst the wire'is being mounted in place in the recess 9. After the wire has been mounted in place in the recess 9, the retainers 14 are swung back into the solid line position of Figure 1, so that the outer ends of the retainers extend across therecess 9 and hold the wire in place in the recess and on the tool 10. hen the retainers ldmove back into the solid. line position of Figure-1, they bear against the projections 21 on the backstop pawl 17 and IDOVG'lZhG'bELCli stop pawl out of engagement with the teeth 8 of the ratchet wheel 7, so that the: ratchet wheel can be rotatedto twist the wire.

Thisis done by swinging thehandle 1 back andforth', thepawl1'2 imparting rotation to 2 the ratchet wheel. After the twistingoperainghas been carried out as'far as; desired, the

recess 9 in the ratchet wheel 7 can be broughtinto registration with. the notch 5 in the end of the handle, and when the retainers ld are swung over into the dash line position of Figure 1, the twisted wire can he slipped offv thetongue l0and out of the: notch 5.

Many'parts of the tool .are housed within the handle-and arenot likely to be broken whenthe: tool; is-misused" in the hand of a wheel being provided with wire holding means located in the recess, a retainer located on the outside of thehandle and extending, when in closed position, across-the opening and the recess to maintain the wire to be twisted engaged with said means when the ratchet wheel is in the aforesaid predeter- "minedposition, an actuatingpawl within the pawl for swinging movement, a back stop pawl within the handle and cooperating with the ratchet wheel, the baclrstop pawl andthe retainer havving interengagingelementswhich cooperate to, disengage the back stop-pawl from-ther-ratchet wheel when theretainer' is moved to closed position with respect to the opening and the recess.

2. A wire twisting tool comprising a handle, a ratchet wheel journaled in the handle and having a wire holding means,'a retainer pivotally mounted on the handle and movable to such a position as to hold the wire to be twisted engaged with the wire holding means, an actuating pawl pivotally mounted on the handle and cooperating with the ratchet wheel, a back stop pawl movably mounted upon the handle and cooperating with the ratchet Wheel, the back stop pawl and the retainer having interengaging elements which cooperate to disengage the back stop pawl'from. the ratchet Wheel when the retainer is moved to the aforesaid position.-

In testimony that I claimthe foregoing as my own, I have hereto afiixed my signature.

RUDOLPH A. A. DREVVS 

